Fast flow thread in lavatory drain

ABSTRACT

A splash-proof lavatory drain consists of a top, a tailpiece tube, and a flanged threaded pipe penetrating a drain hole in a vessel interior, wherein the flange engages the rim of the drain hole and is tightened by a nut and seals against the underside of the vessel. The top is a laterally perforated tube surmounted with a dome. The tube portion of the top inserts into the upper interior of a central perforation of the flange such that the dome prevents splash back from the drain interior and the rectangular perforations allow for drainage. This top is attached to the flanged threaded pipe by a range of means including a thread mate or a press fit. Drainage flow is increased by notching the lower edge of each perforation. Drainage flow is increased by notching the bottom of the perforations either partly or fully to the bottom of the top tube.

CROSS-REFERENCE TO RELATED APPLICATIONS

No cross reference is made to other applications.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OF DEVELOPMENT

No Federal Government support was received in the development of this Invention.

SEQUENCE LISTING, TABLE, OR COMPUTER PROGRAM LISTING

No sequence listing, table, or computer program is attached or accompanies this Application.

FIELD OF THE INVENTION

The present Invention relates generally to vessel drains, and more particularly to vessel drains that are splash proof.

SUMMARY OF THE INVENTION

This Application describes a fast flow splash proof drain fitting for a lavatory vessel. A drain fitting is a device affixed to a vessel drain hole to allow for drainage of water out of the vessel to a sewerage system that is contiguous with the bottommost portion of the drain fitting. A vessel drain consists of three parts, a top, a plug, and a tailpiece. The plug is a flanged, externally threaded pipe with the flange resting on the rim of the drain hole of the vessel and the pipe penetrating the hole to emerge on the underside of the vessel, where it is secured with a seal and tightening nut. The tailpiece is attached contiguously to the lower end of the plug by a plurality of means, and serves as an adjustable connector to the water trap leading to the sewerage system. The top can play multiple roles based on its design and material. In this Invention, the top design is a tubular portion surmounted by a dome, where the tube is perforated laterally. The free end of the tube distal to the dome is inserted concentrically into an upper central perforation of the plug flange. The depth of insertion is stopped by a stopping device, including a threadstop on a threadmate, or a simple ledge. Said stop is positioned such that penetration occurs to a depth at which coplanarity or flushness between the surrounding plug flange and the bottom edge of the lateral perforations in the tubular portion of the top is achieved. This assures that drainage water can flow from vessel interior over drain plug flange and through the lateral perforations of the top without impedance into the drain interior.

In practice, this drain design does not drain well. Fast drain flow can be achieve by notching of the bottom surface of the rectangular, lateral perforations of the drain tube, either fully through the remaining continuous ring of tube that is inserted into the central perforation in the plug flange, or by partly notching the bottom surface of said rectangular perforations. Notches are material removals. This notching is the key to fast flow, and central to this Application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a lateral view of the lavatory drain with top inserted.

FIG. 2 shows an exploded lateral view of the lavatory drain with a fully notched top above a drain plug.

FIG. 3 shows an exploded lateral view of the lavatory drain with a partly notched top above a drain plug.

FIG. 4 shows a lateral view of a fully notched top.

FIG. 5 shows a lateral view of a partly notched top.

DETAILED DESCRIPTION OF THE INVENTION

The lavatory drain in FIG. 1 show a top 13 with a convex upper surface 1 to shed water, the planar underside from which supports a tubular portion bearing perforations 2 interspersed with posts 3. Said top 13 inserts concentrically into a plug 14. The plug 14 comprises a flange 4 for engaging the rim of a drain hole in the bottom of a lavatory vessel, said flange supporting a pipe 5 attached to said flange 4 by a plurality of means. Said pipe 5 bears an external thread 7 onto which an internally threaded nut 9 is threaded in a helical fashion. A slip washer 8 can enable tightening of said nut 9 against a seal 6. At the free end 10 of the externally threaded plug 14 a tailpiece 11 is attached by a plurality of means, its downward free end 12 further connected to a water trap contiguous with piping leading to a sewer.

An exploded view of this drain in FIG. 2 shows a fully notched top 13 that will insert concentrically into a plug 14. The attachment of the two pieces is achieved by a plurality of means including a threadmate, or a press fit stopped by a stop internal to the plug.

An exploded view of this drain in FIG. 3 shows a partly notched top 15 that will insert concentrically into a plug. The attachment of the two pieces is achieved by a plurality of means including a threadmate, or a press fit stopped by a stop internal to the plug.

The fully notched top 13 shown in FIG. 4 displays a plurality of notches fully interrupting the tubular portion distal to the dome top. The tubular portion may be decorated with a fastening feature including a thread, or may be bare tube.

The fully notched top 15 shown in FIG. 5 displays a plurality of notches only partly interrupting the tubular portion distal to the dome top. The tubular portion may be decorated with a fastening feature including a thread, or may be bare tube. 

1. A flanged threaded pipe with a tubular top surmounted by a dome, wherein: the tube part of the top is rectangularly perforated laterally and the tube is inserted concentrically into a top central perforation of the flanged threaded pipe to a set depth that leaves the bottom edge of the lateral perforations of the tube flush with the pipe flange and available for water to drain through, constituting a drain fitting for a vessel.
 2. A drain fitting as claimed in claim 1, wherein: the cylindrical ring of the tube part of the top distal from the dome top is notched at the bottom of the tube perforations, this notching being fully to the bottom of the tube part of the top.
 3. A drain fitting as in claim 1, wherein: the cylindrical ring of the tube part of the top distal from the dome top is partly notched at the bottom of the tube perforations, this notching not reaching the bottom of the tube part of the top. 